Blog

Thinking strategically about the body of your speech means:

First class levers have the resistance (load) and effort (muscle) acting on the same side of the fulcrum, and the resistance is closer to the fulcrum.

A muscle with a parallel arrangement of muscle fibers generates more force than one with a pennate arrangement.

Given the length of side A = 3 m, and side B = 5 m of a triangle, find the acute angles and the hypotenuse.

For a human joint with three degrees of freedom, describe the types of joint rotation (i.e., joint motion) that can occur, and indicate the anatomical axis of rotation for each motion and the anatomical plane in which it occurs.

A rigid body (modeled as a stick) is attached to a surface via a hinge joint and is being pulled up by a string. The image below illustrates this scenario. Which of the following cases has the smallest tension (lowest force) in the string? You may also think of this as a muscle force acting on a bone about a joint, if that helps you visualize. Please check the letter corresponding to your answer.

The constant k indicates the stiffness of a spring.

Define “degree of freedom.”

1. I acknowledge that this exam is open-note and open-book, and is to be taken with a non-phone calculator. I acknowledge that no outside help from another person or bot is allowed. I therefore confirm that all work that I submit today is my own, and I fully understand that any evidence of cheating or exam copying is a violation of the ASU Academic Integrity policy and will be subject to administrative action. 2. I acknowledge that I will clearly number and document all my written work for solving the numeric problems on this exam, and I will submit a scanned copy of any written work within 10 minutes of turning my exam in. Failure to do so will prevent my work from being considered for partial credit. 3. I also acknowledge that I will submit my written work after I have submitted my exam. I will return to the Midterm 1 module and upload my work using the provided link.

There are three elbow flexor muscles. Suppose that the elbow joint is flexed to 90° and that these muscles are generating 290, 440, and 95 N of force and pulling at angles of 40°, 11.4°, and 17.2° respectively, relative to the horizontal. For simplicity, assume the three muscles share a common point of attachment on the radius. Calculate the direction and the magnitude of the resultant muscle force.